JPH11142748A - Medical stereomicroscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the medical stereomicroscope which can surely match the view range of a surgical operator for an observation position with the view range of operation assistants and nurses. SOLUTION: This medical stereomicroscope 1 has a lighting optical system 4 which projects the illumination light from a halogen lamp on the observation position OP, a main observation optical system 2 which is provided with two main optical paths for guiding an observed image formed with the light reflected at the observation position OP and equipped with a gaze detecting means for detecting the gaze of the surgical operator, an image pickup optical system 4 which is equipped with an area CCD 64a and an image pickup range changing means for changing the image pickup range of the observed image by the area CCD 64a and arranged branching halfway off the main optical path, and a CPU circuit 73 which controls the image pickup range changing means according to detection information on the gaze of the surgical operator by the gaze detecting means and information on the image pickup range of the observed image by the area CCD 64a so that the gaze position of the surgical operator enters the image pickup range of the image pickup optical system 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical stereo microscope, and more particularly, to a medical stereo microscope having an electronic imaging device for electronically imaging an observation site.

[0002]

2. Description of the Related Art In this type of medical stereomicroscope, illumination light from an illumination light source is projected onto an observation site via an illumination optical system, and an image to be observed due to light reflected from the observation site is reflected by the observation optical system. By guiding the eyepiece through two main optical paths to the eyepiece, the operator can observe an observation site (for example, a surgical site of the eye to be examined) with the binocular.

[0003] In addition, since the surgical assistant and nurse are involved in the surgery in cooperation with the surgeon, it is necessary to observe the observation site in the same manner as the surgeon.

For this reason, a stereoscopic medical microscope is provided with an auxiliary optical system that branches off in the middle of one of the main optical paths, and the image to be observed is imaged by an image sensor provided in this optical system, and a CRT display or the like is used. By displaying the image to be observed on the screen of the display means, the assistant and the nurse can observe the observation site.

[0005]

When an operator is operating on the periphery of his or her field of view, the operator sets the medical stereomicroscope at a position where it is easy to operate, and sets a magnification suitable for observation. You are looking at the site, but in this case, you are not looking at the entire range of the observed site.

[0006] Since the range of the observation region viewed on the screen of the display means via the image pickup device is generally narrower than the range of the observation region viewed by the surgeon through the eyepiece, the surgeon can view his or her own visual field. If a surgical operation is performed in the peripheral area, it is difficult to display the observed image of the peripheral area on the screen of the display means, and it is difficult for a surgical assistant or a nurse to see the observed image of the peripheral area. Or become completely invisible.

[0007] Such a situation hinders a surgical operation performed jointly by the surgeon, a surgical assistant and a nurse.

In order to solve such a problem, it is necessary to ensure that the surgical assistant and the nurse can observe the observation region that the operator is watching closely.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a medical stereomicroscope capable of reliably matching the visual range of an operator to an observation site with the visual ranges of a surgical assistant and a nurse. The purpose is to do.

[0010]

According to the first aspect of the present invention,
An illumination optical system for projecting illumination light from an illumination light source to an observation site, an observation optical system provided with two main optical paths for guiding an image to be observed by the reflected light reflected from the observation site, and halfway through the main optical path A medical stereo microscope having an imaging optical system that captures the observed image using an imaging device, and the imaging optical system provided by branching from the middle optical path of the observation optical system. The imaging range can be changed.

According to the present invention, the imaging range of the image to be observed can be changed by the imaging optical system branched from the middle of the main optical path of the observation optical system in the stereo microscope.
By appropriately changing the imaging range of the image to be observed by the imaging optical system, or by matching the visual range of the operator to the observation site using the optical system and the imaging range of the image to be observed by the imaging optical system or It is possible to set the imaging range within the visual range of the operator.

Therefore, the surgical assistant and the nurse can surely visually recognize the visual range of the operator via the imaging optical system.

According to a second aspect of the present invention, there is provided a medical stereo microscope, comprising: an illumination optical system for projecting illumination light from an illumination light source to an observation site; and an illumination optical system for guiding an image to be observed by light reflected from the observation site. A main optical path is provided, and an observation optical system including a line-of-sight detection unit that detects a line of sight of an operator, and an imaging element, and an imaging range changing unit that changes an imaging range of an image to be observed by the imaging element. An imaging optical system branched and arranged from the middle of the main optical path, detection information of an operator's line of sight by the line of sight detection means, and information on an imaging range of an image to be observed by the imaging optical system, Control means for controlling the imaging range changing means so that the operator's line of sight falls within the imaging range of the imaging optical system.

According to the present invention, the imaging optical system is provided with an imaging range changing means for changing an imaging range of an image to be observed by the imaging device, and the control means controls the gaze detection means to detect the gaze of the operator. And controlling the imaging range changing means so that the operator's line of sight is within the imaging range of the imaging optical system, based on information on the imaging range of the image to be observed by the imaging optical system.

This makes it possible to set the imaging range of the image to be observed by the imaging optical system within the range of the operator's view of the observation site using the observation optical system.

Therefore, as in the case of the first aspect of the present invention, the surgeon's assistant and the nurse can surely visually recognize the visual range of the operator via the imaging optical system.

A medical stereo microscope according to a third aspect of the present invention is the medical stereo microscope according to the second aspect, wherein the imaging optical system is held by an imaging range changing means and places the observed image on a light receiving surface of an imaging device. Having an imaging lens for forming an image,
The control means, based on detection information of the operator's line of sight by the line of sight detection means, and information on the imaging range of the image to be observed by the imaging optical system, the imaging range change means and the optical axis of the imaging optical system The imaging lens is configured to be driven in two-dimensional directions orthogonal to each other to move the imaging lens such that the line of sight of the operator is within an imaging range of an imaging optical system.

According to the present invention, by the control means,
Detection information of the operator's line of sight by the line-of-sight detection unit, and information on the imaging range of the image to be observed by the imaging optical system, based on the imaging range changing unit holding the imaging lens and the optical axis of the imaging optical system Since the operator's line of sight is driven within the imaging range of the imaging optical system by driving in the orthogonal two-dimensional direction, the surgeon's visual recognition range can be reliably determined by the surgical assistant and nurse via the imaging optical system. Can be visually recognized.

A medical stereo microscope according to a fourth aspect of the present invention is the medical stereo microscope according to the second aspect, wherein the imaging optical system has an imaging element held by an imaging range changing means, and the control means is The imaging range changing means is two-dimensional orthogonal to the optical axis of the imaging optical system based on detection information of the operator's line of sight by the visual axis detection means and information on the imaging range of the image to be observed by the imaging optical system. The imaging device is configured to be driven in a direction to move the image sensor so that the line of sight of the operator is within an imaging range of an imaging optical system.

According to the present invention, the control means:
Based on detection information of the operator's line of sight by the line of sight detection unit and information on the image pickup range of the image to be observed by the image pickup optical system, the image pickup range changing unit holding the image pickup device is orthogonal to the optical axis of the image pickup optical system. Since the gaze position of the operator is set within the imaging range by the imaging optical system by driving in the two-dimensional direction, the visual recognition range of the operator is surely recognized by the surgical assistant and the nurse via the imaging optical system. can do.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a medical stereo microscope according to the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 shows Embodiment 1 of the present invention.
FIG. 2 is an overall configuration diagram of the medical stereo microscope of FIG.
It is a line sectional view.

The medical stereo microscope 1 shown in FIGS. 1 and 2 has a housing H formed in a substantially cylindrical shape, and a small-diameter lens barrel h1 and a lens barrel projecting from the housing H to the left and right sides in FIG. And a part h2 for observing an image of an observation part OP located below the housing H.

The observation site OP includes the eye to be inspected and other operative parts. In the following description, the case where the observation site OP is the eye to be inspected will be mainly described.

The medical stereo microscope 1 comprises an illumination optical system 1a (see FIG. 2) for observation and photographing provided in the housing H, a main observation optical system 2, and an auxiliary observation optical system 3 provided in the lens barrel h1. (See FIG. 1), and has an image pickup optical system 4 for picking up an image of the observation site OP provided in the lens barrel h2.

The illumination optical system 1a includes a halogen lamp 1
0, illumination lens 11, prism 12, objective lens 13
The illumination light from the halogen lamp 10 is applied to the observation site OP facing the objective lens 13 via the illumination lens 11, the prism 12, and the objective lens 13.

The halogen lamp 10 includes a CPU circuit 7
The dimming drive is performed by a control circuit 81 operating under the control of No. 3.

The main observation optical system 2 has two left and right optical systems 2a and 2b for enabling observation with a binocular.

In the optical system 2a, an objective lens 13, a variable power lens 30, a beam splitter 31, an imaging lens 32, an erecting prism 33, a rhombic prism 34 for adjusting the interpupillary distance, and an eyepiece 35 are arranged in this order. .

The optical system 2b is, like the optical system 2a,
Objective lens 13, variable power lens 40, beam splitter 4
1. An imaging lens 42, an erect prism 43, a rhombic prism 44 for adjusting the interpupillary distance, and an eyepiece 45 are arranged in this order.

Further, in the vicinity of the eyepiece 45, a line-of-sight detecting unit 71 for detecting the line-of-sight information of the operator, and controlled by the CPU circuit 73, process the line-of-sight information of the operator detected by the line-of-sight detecting unit 71. And a detection processing circuit 72 that performs the processing.

As shown in FIG. 2, the line-of-sight detection unit 71 includes an infrared LED 710, a projection lens 711, a half mirror 712, a prism 713 having a dichroic surface, an imaging lens 714, and a two-dimensional CCD 715. .

The image to be observed due to the reflected light from the observation site OP is observed by both eyes of the operator via the left and right optical systems 2a and 2b.

Further, corresponding to the beam splitters 31 and 41 in the housing H, openings of a lens barrel h1 containing the auxiliary observation optical system 3 and a lens barrel h2 containing the imaging optical system 4 are arranged. I have.

The auxiliary observation optical system 3 has an imaging lens 50 for condensing the light beam from the beam splitter 31, a reflection mirror 51, an optical member not shown, and an eyepiece 52.

The image to be observed due to the reflected light from the observation site OP is formed by an objective lens 13, a variable power lens 30, a beam splitter 31, an imaging lens 50, a reflection mirror 51, an optical member not shown, and an eyepiece 52. And so on, to be observed by the surgical assistant.

The imaging optical system 4 includes a beam splitter 4
An imaging lens 60 for condensing the light beam from the light source 1 and a reflecting mirror 6
3a, an electronic camera 64 fixed to the lens barrel h2 is provided in this order.

The lens barrel h2 has an X-direction drive position detection unit 75 and a Y-direction drive position detection unit 76 which hold the imaging lens 60. These units are driven by a drive circuit 74 in the X and Y directions, respectively. By driving, the imaging lens 6
0 is moved in each of the X direction and the Y direction. The light flux condensed by the imaging lens 60 and reflected by the reflection mirror 63a is incident on the electronic camera 64, and the image to be observed is formed on the light receiving surface of the area CCD 64a, which is an image pickup device provided in the electronic camera 64. An image is formed.

An image signal of the observed image picked up and output by the electronic camera 64 is sent to a monitor television 67 via a CCU (camera control unit) 66, and is displayed on the screen of the monitor television 67 as shown in FIG. The observation image is displayed on the screen.

Next, the operation of the medical stereomicroscope having the above-described configuration will be described with reference to an example in which the observation site OP is the eye to be examined.

The illumination light from the halogen lamp 10 is
The subject's eye, which is the observation site OP, is illuminated via the illumination lens 11, the prism 12, and the objective lens 13.

The image of the eye to be inspected, which is the image to be observed due to the light reflected from the eye to be inspected, is observed by both eyes of the operator through the left and right optical systems 2a and 2b as shown in FIG. While observing the image of the eye to be inspected, observation and surgery of the eye to be inspected are performed. The observation range ER including the image of the subject's eye observed by both eyes of the operator is shown by a circle in FIG.

On the other hand, the reflected light from the subject's eye passes through the objective lens 13, the variable power lens 40, the beam splitter 41, the image forming lens 60, and the reflection mirror 63a, and is transmitted to the electronic camera 64.
And an image to be observed is formed on the incident surface of the area CCD 64a of the electronic camera 64, processed by the electronic camera 64, sent to the monitor television 67 through the CCU 66, and reflected by the eye to be inspected. The image is displayed on the screen of the monitor television 67. The area CCD 64a
Is shown by a square in FIG.

A surgical assistant or a nurse performs an operation of assisting an operator's operation while watching the eye image displayed on the monitor TV 67.

Next, a procedure for detecting the operator's line of sight and displaying an image in or near the operator's line of sight on the screen of the monitor television 67 will be described with reference to FIG.

Using the infrared light source 710 as a light source, the rhombic prism 3 passes through a projection lens 711, a half mirror 712, a prism 713, and a dichroic filter 716.
4. The line of sight detection infrared light guided to the eyepiece 35 is projected onto the cornea of the operator, and the reflected light passes through the eyepiece 35, the rhombic prism 34, the dichroic filter 716, and the prism 713, and passes through the half mirror 712. The infrared light source 7 is reflected to the two-dimensional CCD 715 by the imaging lens 714.
Ten images are projected.

The output signal of the two-dimensional CCD 715 is processed by the detection processing circuit 72, and the position information of the corneal reflected light is input to the CPU circuit 73. This becomes information on the gaze direction of the operator. That is, FIG. 3 shows the line-of-sight position P with respect to the image of the eye to be inspected by the surgeon.

Further, an image is formed based on position detection signals from an X-direction drive position detection unit 75 and a Y-direction drive position detection unit 76 for detecting and moving the position of the imaging lens 60 in the X and Y directions. The CPU circuit 73 recognizes the position of the lens 60 (the imaging range of the subject's eye).

Next, in the X and Y directions, the operator's line of sight position P input to the CPU circuit 73 in this way and the approximate center C of the imaging range PE of the area CCD 64a determined by the position of the imaging lens 60. Each difference x and y is obtained by the CPU circuit 73.

Then, the CPU circuit 73 outputs a correction signal from the CPU circuit 73 to the driving circuit 74 so as to move the imaging lens 60 by the obtained difference x, y in the X direction and the Y direction. The drive circuit 74 includes an X-direction drive position detection unit 75 and a Y-direction drive position detection unit 7.
6 are respectively driven in the X direction and the Y direction by the difference x and y in accordance with the correction signal, and the position of the imaging lens 60 is changed.
Such an operation is repeated as appropriate.

As a result, as shown in the right column of FIG. 3, the operator's line-of-sight position P substantially coincides with the center C of the imaging range of the area CCD 64a. Can be within the imaging range PE by
A surgical assistant and a nurse can surely visually recognize the gaze position P of the operator and the observation range ER via the imaging optical system 4 and the monitor television 67.

(Embodiment 2) Next, Embodiment 2 of the present invention will be described with reference to FIGS. 4 and 5
In the medical stereo microscope according to the second embodiment of the present invention shown in FIG. 1, those having the same functions as those of the medical stereo microscope according to the first embodiment of the present invention shown in FIGS. Detailed description is omitted.

The medical stereo microscope according to the second embodiment of the present invention shown in FIGS. 4 and 5 has substantially the same configuration as that of the medical stereo microscope according to the first embodiment, but the imaging optical system 4 in the lens barrel h2. Of the electronic camera 64 are respectively held by an X-direction drive position detection unit 641 and a Y-direction drive position detection unit 642, and these are respectively held in the X direction and Y
The feature is that it can be moved in any direction.

Next, the operation of the medical stereo microscope according to the second embodiment will be described.

The illumination light from the halogen lamp 10 illuminates the subject's eye, which is the observation site OP, via the illumination lens 11, the prism 12, and the objective lens 13.

The image of the eye to be inspected by the reflected light from the eye to be inspected is observed by both eyes of the operator via the left and right optical systems 2a and 2b, and the operator observes the image of the eye to be inspected while viewing the image of the eye to be inspected. Observe and perform surgery.

On the other hand, the reflected light from the eye to be inspected passes through the objective lens 13, the variable power lens 40, the beam splitter 41, the imaging lens 60, and the reflection mirror 63a, and passes through the electronic camera 64.
And an eye image is formed on the incident surface of the area CCD 64a of the electronic camera 64, and this eye image is displayed on the screen of the monitor television 67 in the same manner as described above.

A surgical assistant or a nurse performs an operation of assisting the operator's operation while watching the eye image displayed on the monitor TV 67.

Next, the procedure for detecting the surgeon's line of sight and displaying an eye image within or near the surgeon's visual range on the screen of the monitor TV 67 will be described.

The infrared light source 710 is used as a light source, and the projection lens 7
11, through a half mirror 712 and a prism 713,
Dichroic filter 716, rhombic prism 34,
The line-of-sight detection infrared light guided to the eyepiece 35 is projected onto the cornea of the operator, and the reflected light passes through the eyepiece 35, the rhombic prism 34, the dichroic filter 716, and the prism 713, and is reflected by the half mirror 712. , An infrared light source 710 to a two-dimensional CCD 715 by an imaging lens 714.
Is projected.

The output signal of the two-dimensional CCD 715 is processed by the detection processing circuit 72, and the position information of the corneal reflected light of the eye to be examined is input to the CPU circuit 73. This becomes gaze direction information.

The X-direction drive position detecting unit 6
41, the position of the electronic camera 64 is determined by the CPU circuit 7 based on each position detection signal from the Y direction drive position detection unit 642.
3 recognizes.

Next, the information on the operator's line of sight input to the CPU circuit 73 in this manner and the X direction and the Y direction between the substantially center C of the imaging range PE of the area CCD 64a determined by the position of the electronic camera 64. Each difference x, y of the CPU circuit 73
Ask for.

Then, the CPU circuit 73 outputs a correction signal from the CPU circuit 73 to the drive circuit 643 so as to move the electronic camera 64 by the obtained difference in the X direction and the Y direction. , X direction drive position detection unit 641, Y direction drive position detection unit 64
2 are driven according to the correction signal, and the area CCD 6
The electronic camera 64 holding 4a is moved in the X and Y directions by the difference x and y to change the position of the electronic camera 64. Such an operation is repeated as appropriate.

As a result, as in the case of the first embodiment, as shown in FIG.
The center of the imaging range 64a is substantially coincident with the center C, and the operator's line-of-sight position P can be within the imaging range PE of the imaging optical system 4, and the operator's line-of-sight position P and the observation range The surgical assistant and the nurse can surely visually recognize the ER via the imaging optical system 4 and the monitor television 67.

In Embodiments 1 and 2 described above,
The gaze of the operator is detected, and the imaging lens 60 or the electronic camera 6 is detected.
As a repetition period for moving the imaging lens 4, firstly, when the operation is performed at a constant interval, secondly, the line of sight of the operator is constantly detected, and only when the difference x, y becomes more than a certain level, the imaging lens 60.
Alternatively, the electronic camera 64 may be moved.

It is of course possible to adopt a mode in which the operator's line of sight is not detected and the imaging lens 60 or the electronic camera 64 is not moved at all.

Further, although not shown, an operation switch may be provided, and a mode in which the operator's line of sight is detected and the imaging lens or the electronic camera 64 is moved only when this operation switch is pressed may be added. It is.

As described above, according to the first and second embodiments of the present invention, the area on which the operator is gazing is displayed on the screen of the monitor television 57, so that the operator can concentrate on the operation. The surgical assistant, nurse, or the like can accurately grasp the movement of the operator who is performing, and the surgical assistant, nurse, or the like can quickly cope with the progress of the operation.

[0070]

According to the first aspect of the present invention, by appropriately changing the imaging range of the image to be observed by the imaging optical system, the imaging range is set within the viewing range of the operator, and the operator can view the image. It is possible to provide a stereo microscope in which the range can be surely visually recognized by the surgical assistant and the nurse via the imaging optical system.

According to the second aspect of the present invention, by using the detection information of the operator's line of sight and the information of the imaging range of the image to be observed by the imaging optical system, the imaging range changing means is controlled.
It is possible to provide a stereoscopic microscope in which the imaging range is set within the visual range of the operator so that the surgical assistant and nurse can surely visually recognize the visual range of the operator via the imaging optical system.

According to the third aspect of the present invention, the imaging range changing means holding the imaging lens is driven in a two-dimensional direction orthogonal to the optical axis of the imaging optical system, and the line of sight of the operator is determined by the imaging optical system. Therefore, it is possible to provide a stereoscopic microscope in which a surgical assistant and a nurse can surely visually recognize the visual range of the operator via the imaging optical system.

According to the fourth aspect of the present invention, the imaging range changing means holding the imaging element is driven in a two-dimensional direction orthogonal to the optical axis of the imaging optical system, and the line of sight of the operator is determined by the imaging optical system. Since the imaging range is set within the imaging range, it is possible to provide a stereoscopic microscope in which a surgical assistant and a nurse can surely view the visual range of the operator via the imaging optical system.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a medical stereomicroscope according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an explanatory diagram illustrating a relationship between an operator's visual recognition range and an imaging range of an area CCD 64a according to the first embodiment of the present invention.

FIG. 4 is an overall configuration diagram of a medical stereomicroscope according to Embodiment 2 of the present invention.

FIG. 5 is a sectional view taken along line BB of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Medical stereo microscope h1 lens barrel part h2 lens barrel part OP Observation part 1a Illumination optical system 2 Main observation optical system 2a Optical system 2b Optical system 3 Auxiliary observation optical system 4 Imaging optical system 10 Halogen lamp 11 Illuminating lens 12 Prism 13 Objective Lens 30 Zoom lens 31 Beam splitter 32 Imaging lens 33 Erect prism 34 Diamond prism 35 Eyepiece 60 Imaging lens 63a Reflection mirror 64 Electronic camera 64a Area CCD 66 CCU 67 Monitor television 72 Detection processing circuit 73 CPU circuit 75 X direction Drive position detection unit 76 Y direction drive position detection unit

Claims (4)

[Claims] An illumination optical system for projecting illumination light from an illumination light source to an observation site, an observation optical system provided with two main optical paths for guiding an image to be observed by light reflected from the observation site, An imaging optical system that branches off from the middle of the main optical path and captures the image to be observed using an image sensor; and a medical stereo microscope comprising: an imaging optical system that branches off from the middle of the main optical path of the observation optical system. A medical stereo microscope characterized in that an imaging range of an image to be observed by a system can be changed. 2. An illumination optical system for projecting illumination light from an illumination light source onto an observation site, and two main optical paths for guiding an image to be observed by reflected light reflected from the observation site are provided. An observation optical system having a line-of-sight detecting means for detecting, and an imaging element, and an imaging range changing means for changing an imaging range of an image to be observed by the imaging element,
An imaging optical system branched off and arranged from the middle of the main optical path; detection information of an operator's line of sight detected by the line of sight detection means; and information on an imaging range of an image to be observed by the imaging optical system. Control means for controlling the imaging range changing means so that the line of sight of the user is within the imaging range of the imaging optical system. 3. The imaging optical system has an imaging lens that is held by an imaging range changing unit and forms the observed image on a light receiving surface of an imaging device. Based on the detection information of the user's line of sight and information on the imaging range of the image to be observed by the imaging optical system, the imaging range changing means is driven in a two-dimensional direction orthogonal to the optical axis of the imaging optical system, 3. The medical stereo microscope according to claim 2, wherein the imaging lens is moved so that a line of sight of an operator is within an imaging range of the imaging optical system. 4. The image pickup optical system has an image pickup device held by an image pickup range changing unit, and the control unit detects detection information of an operator's line of sight by the line of sight detection unit and an object to be observed by the image pickup optical system. Based on the information on the imaging range of the image, the imaging range changing means is driven in a two-dimensional direction orthogonal to the optical axis of the imaging optical system, so that the gaze position of the operator is within the imaging range of the imaging optical system. 3. The medical stereo microscope according to claim 2, wherein the imaging element is moved so as to be as follows.